How Seeds Travel

What You'll Learn

Succession is the gradual change of an ecosystem over time. Primary succession begins on bare rock, while secondary succession occurs after a disturbance like a fire.

Key Words

adaptation
fossil record
species

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Set up a composting experiment: place food scraps in one sealed bag and leaves in another. Observe decomposition over two weeks and record changes.

Step 3 — Observe

Note any unexpected results and think about why they happened.

Step 4 — Record

Share your findings with the class or a partner and discuss what you learned.

Check Your Understanding

Question 1

1 of 3

What is the function of chloroplasts in plant cells?